SU610789A1 - Method of obtaining sulfurous gas - Google Patents

Description

one

The invention relates to methods for producing sulfur dioxide from sulfur-containing material.

There are known methods for producing sulphurous angi; E1rida, which includes its two-stage combustion with intermediate cooling during the combustion of sulfur in the first stage with a lack of oxygen, 2. The disadvantage of this method is the multistage process.

The closest to the described invention to the technical essence and the achieved result is a method of obtaining sulfur dioxide from lump sulfur, including the supply of air and sulfur to the furnace, its melting, evaporation and combustion of vapor by supplying air to the sublattice and superlattice zones, removing donkeys E. The disadvantage of this method is the low intensity of the evaporation process, which is carried out only from the surface of the molten sulfur layer, the possibility of spattering, and the formation of slags that must be removed.

The aim of the invention is to intensify the processes of evaporation and combustion of sulfur.

This goal is achieved by the fact that air is supplied to the sublattice and supernatural zone in a volume ratio of 0.25-3.0: 1, and the temperature of the upstream flow is maintained at 900-1200 ° C.

The process technology is as follows: lump sulfur is loaded in the middle part of the furnace, the temperature in which is maintained equal to 900-1200 s. Pada, particles all their surface in contact with a stream of hot air. In this case, on the surface of the particles, sulfur boils and evaporates. Sulfur vapors rise and burn to form sour gas.

Example. In the KS furnace with a sweat area of 10.8 m, air is supplied in an amount of 16,000. The temperature in the furnace volume is maintained at 1000 ° C. The results of the tests are presented in the table, from which it can be seen that with ratios of sublattice and sublattice air less than 0.25, the concentration of sulfur dioxide sharply decreases; At ratios greater than 3.0, the gas temperature after the furnace increases, which indicates that sulfur does not have time to completely burn in the furnace volume. This is also evidenced by the decrease in the concentration of sulfur dioxide.

The variation of temperature in the furnace volume indicates that with a concentration of sulfur dioxide reaches 13%. A further increase in temperature leads to an increase in the concentration of sulfur dioxide, however, at temperatures above 1200-1300 0, the lining of the kiln made of chamotte brick begins to deteriorate.

The data of industrial tests show that as a result of using the proposed method, an increase in the concentration of sulfur dioxide occurs, which makes it possible to reduce the specific consumption of 100% sulfur per ton of produced sulfuric acid per kg. Thus, the economic efficiency of the invention is to increase the combustion rate of sulfur and reduce

its specific consumption.

Claims (3)

1. A method for producing sulfur dioxide from sulfur, including melting it, evaporating and burning vapors by supplying air to the sub-grid and grid zone of the furnace, characterized in that, in order to intensify the processes of evaporation and combustion, air is fed into the sub-grid and super-grid zone in a volume ratio of 0 , 25-3 ,. 2. Method POP1, characterized in that the temperature of the upstream is maintained equal to 900-1200 ° C. Sources of information taken into account in the examination: 1. The patent of England W 1411626, C 01 B 17/54, 23.10.75. 2. The patent of the USSR 383268, C 01 B 17/54, 09/23/1970. 3. Authors certificate of the USSR 470689, Р 27 В 15/00, 04.05.70.